V4L/DVB (6602): V4L: Convert videobuf drivers to videobuf_stop
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / saa7134 / saa7134-empress.c
1 /*
2 *
3 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #include <linux/init.h>
21 #include <linux/list.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/slab.h>
25 #include <linux/delay.h>
26
27 #include "saa7134-reg.h"
28 #include "saa7134.h"
29
30 #include <media/saa6752hs.h>
31 #include <media/v4l2-common.h>
32
33 /* ------------------------------------------------------------------ */
34
35 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
36 MODULE_LICENSE("GPL");
37
38 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
39
40 module_param_array(empress_nr, int, NULL, 0444);
41 MODULE_PARM_DESC(empress_nr,"ts device number");
42
43 static unsigned int debug = 0;
44 module_param(debug, int, 0644);
45 MODULE_PARM_DESC(debug,"enable debug messages");
46
47 #define dprintk(fmt, arg...) if (debug) \
48 printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
49
50 /* ------------------------------------------------------------------ */
51
52 static void ts_reset_encoder(struct saa7134_dev* dev)
53 {
54 if (!dev->empress_started)
55 return;
56
57 saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
58 msleep(10);
59 saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
60 msleep(100);
61 dev->empress_started = 0;
62 }
63
64 static int ts_init_encoder(struct saa7134_dev* dev)
65 {
66 struct v4l2_ext_controls ctrls = { V4L2_CTRL_CLASS_MPEG, 0 };
67
68 ts_reset_encoder(dev);
69 saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, &ctrls);
70 dev->empress_started = 1;
71 return 0;
72 }
73
74 /* ------------------------------------------------------------------ */
75
76 static int ts_open(struct inode *inode, struct file *file)
77 {
78 int minor = iminor(inode);
79 struct saa7134_dev *dev;
80 int err;
81
82 list_for_each_entry(dev, &saa7134_devlist, devlist)
83 if (dev->empress_dev && dev->empress_dev->minor == minor)
84 goto found;
85 return -ENODEV;
86 found:
87
88 dprintk("open minor=%d\n",minor);
89 err = -EBUSY;
90 if (!mutex_trylock(&dev->empress_tsq.lock))
91 goto done;
92 if (dev->empress_users)
93 goto done_up;
94
95 /* Unmute audio */
96 saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
97 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
98
99 dev->empress_users++;
100 file->private_data = dev;
101 err = 0;
102
103 done_up:
104 mutex_unlock(&dev->empress_tsq.lock);
105 done:
106 return err;
107 }
108
109 static int ts_release(struct inode *inode, struct file *file)
110 {
111 struct saa7134_dev *dev = file->private_data;
112
113 mutex_lock(&dev->empress_tsq.lock);
114 videobuf_stop(&dev->empress_tsq);
115 videobuf_mmap_free(&dev->empress_tsq);
116 dev->empress_users--;
117
118 /* stop the encoder */
119 ts_reset_encoder(dev);
120
121 /* Mute audio */
122 saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
123 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
124
125 mutex_unlock(&dev->empress_tsq.lock);
126 return 0;
127 }
128
129 static ssize_t
130 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
131 {
132 struct saa7134_dev *dev = file->private_data;
133
134 if (!dev->empress_started)
135 ts_init_encoder(dev);
136
137 return videobuf_read_stream(&dev->empress_tsq,
138 data, count, ppos, 0,
139 file->f_flags & O_NONBLOCK);
140 }
141
142 static unsigned int
143 ts_poll(struct file *file, struct poll_table_struct *wait)
144 {
145 struct saa7134_dev *dev = file->private_data;
146
147 return videobuf_poll_stream(file, &dev->empress_tsq, wait);
148 }
149
150
151 static int
152 ts_mmap(struct file *file, struct vm_area_struct * vma)
153 {
154 struct saa7134_dev *dev = file->private_data;
155
156 return videobuf_mmap_mapper(&dev->empress_tsq, vma);
157 }
158
159 /*
160 * This function is _not_ called directly, but from
161 * video_generic_ioctl (and maybe others). userspace
162 * copying is done already, arg is a kernel pointer.
163 */
164 static int ts_do_ioctl(struct inode *inode, struct file *file,
165 unsigned int cmd, void *arg)
166 {
167 struct saa7134_dev *dev = file->private_data;
168 struct v4l2_ext_controls *ctrls = arg;
169
170 if (debug > 1)
171 v4l_print_ioctl(dev->name,cmd);
172 switch (cmd) {
173 case VIDIOC_QUERYCAP:
174 {
175 struct v4l2_capability *cap = arg;
176
177 memset(cap,0,sizeof(*cap));
178 strcpy(cap->driver, "saa7134");
179 strlcpy(cap->card, saa7134_boards[dev->board].name,
180 sizeof(cap->card));
181 sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
182 cap->version = SAA7134_VERSION_CODE;
183 cap->capabilities =
184 V4L2_CAP_VIDEO_CAPTURE |
185 V4L2_CAP_READWRITE |
186 V4L2_CAP_STREAMING;
187 return 0;
188 }
189
190 /* --- input switching --------------------------------------- */
191 case VIDIOC_ENUMINPUT:
192 {
193 struct v4l2_input *i = arg;
194
195 if (i->index != 0)
196 return -EINVAL;
197 i->type = V4L2_INPUT_TYPE_CAMERA;
198 strcpy(i->name,"CCIR656");
199 return 0;
200 }
201 case VIDIOC_G_INPUT:
202 {
203 int *i = arg;
204 *i = 0;
205 return 0;
206 }
207 case VIDIOC_S_INPUT:
208 {
209 int *i = arg;
210
211 if (*i != 0)
212 return -EINVAL;
213 return 0;
214 }
215 /* --- capture ioctls ---------------------------------------- */
216
217 case VIDIOC_ENUM_FMT:
218 {
219 struct v4l2_fmtdesc *f = arg;
220 int index;
221
222 index = f->index;
223 if (index != 0)
224 return -EINVAL;
225
226 memset(f,0,sizeof(*f));
227 f->index = index;
228 strlcpy(f->description, "MPEG TS", sizeof(f->description));
229 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
230 f->pixelformat = V4L2_PIX_FMT_MPEG;
231 return 0;
232 }
233
234 case VIDIOC_G_FMT:
235 {
236 struct v4l2_format *f = arg;
237
238 memset(f,0,sizeof(*f));
239 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
240
241 saa7134_i2c_call_clients(dev, cmd, arg);
242 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
243 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
244 return 0;
245 }
246
247 case VIDIOC_S_FMT:
248 {
249 struct v4l2_format *f = arg;
250
251 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
252 return -EINVAL;
253
254 saa7134_i2c_call_clients(dev, cmd, arg);
255 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
256 f->fmt.pix.sizeimage = TS_PACKET_SIZE* dev->ts.nr_packets;
257 return 0;
258 }
259
260 case VIDIOC_REQBUFS:
261 return videobuf_reqbufs(&dev->empress_tsq,arg);
262
263 case VIDIOC_QUERYBUF:
264 return videobuf_querybuf(&dev->empress_tsq,arg);
265
266 case VIDIOC_QBUF:
267 return videobuf_qbuf(&dev->empress_tsq,arg);
268
269 case VIDIOC_DQBUF:
270 return videobuf_dqbuf(&dev->empress_tsq,arg,
271 file->f_flags & O_NONBLOCK);
272
273 case VIDIOC_STREAMON:
274 return videobuf_streamon(&dev->empress_tsq);
275
276 case VIDIOC_STREAMOFF:
277 return videobuf_streamoff(&dev->empress_tsq);
278
279 case VIDIOC_QUERYCTRL:
280 case VIDIOC_G_CTRL:
281 case VIDIOC_S_CTRL:
282 return saa7134_common_ioctl(dev, cmd, arg);
283
284 case VIDIOC_S_EXT_CTRLS:
285 /* count == 0 is abused in saa6752hs.c, so that special
286 case is handled here explicitly. */
287 if (ctrls->count == 0)
288 return 0;
289 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
290 return -EINVAL;
291 saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, arg);
292 ts_init_encoder(dev);
293 return 0;
294 case VIDIOC_G_EXT_CTRLS:
295 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
296 return -EINVAL;
297 saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, arg);
298 return 0;
299
300 default:
301 return -ENOIOCTLCMD;
302 }
303 return 0;
304 }
305
306 static int ts_ioctl(struct inode *inode, struct file *file,
307 unsigned int cmd, unsigned long arg)
308 {
309 return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
310 }
311
312 static const struct file_operations ts_fops =
313 {
314 .owner = THIS_MODULE,
315 .open = ts_open,
316 .release = ts_release,
317 .read = ts_read,
318 .poll = ts_poll,
319 .mmap = ts_mmap,
320 .ioctl = ts_ioctl,
321 .llseek = no_llseek,
322 };
323
324 /* ----------------------------------------------------------- */
325
326 static struct video_device saa7134_empress_template =
327 {
328 .name = "saa7134-empress",
329 .type = 0 /* FIXME */,
330 .type2 = 0 /* FIXME */,
331 .fops = &ts_fops,
332 .minor = -1,
333 };
334
335 static void empress_signal_update(struct work_struct *work)
336 {
337 struct saa7134_dev* dev =
338 container_of(work, struct saa7134_dev, empress_workqueue);
339
340 if (dev->nosignal) {
341 dprintk("no video signal\n");
342 ts_reset_encoder(dev);
343 } else {
344 dprintk("video signal acquired\n");
345 if (dev->empress_users)
346 ts_init_encoder(dev);
347 }
348 }
349
350 static void empress_signal_change(struct saa7134_dev *dev)
351 {
352 schedule_work(&dev->empress_workqueue);
353 }
354
355
356 static int empress_init(struct saa7134_dev *dev)
357 {
358 int err;
359
360 dprintk("%s: %s\n",dev->name,__FUNCTION__);
361 dev->empress_dev = video_device_alloc();
362 if (NULL == dev->empress_dev)
363 return -ENOMEM;
364 *(dev->empress_dev) = saa7134_empress_template;
365 dev->empress_dev->dev = &dev->pci->dev;
366 dev->empress_dev->release = video_device_release;
367 snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
368 "%s empress (%s)", dev->name,
369 saa7134_boards[dev->board].name);
370
371 INIT_WORK(&dev->empress_workqueue, empress_signal_update);
372
373 err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
374 empress_nr[dev->nr]);
375 if (err < 0) {
376 printk(KERN_INFO "%s: can't register video device\n",
377 dev->name);
378 video_device_release(dev->empress_dev);
379 dev->empress_dev = NULL;
380 return err;
381 }
382 printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
383 dev->name,dev->empress_dev->minor & 0x1f);
384
385 videobuf_queue_pci_init(&dev->empress_tsq, &saa7134_ts_qops,
386 dev->pci, &dev->slock,
387 V4L2_BUF_TYPE_VIDEO_CAPTURE,
388 V4L2_FIELD_ALTERNATE,
389 sizeof(struct saa7134_buf),
390 dev);
391
392 empress_signal_update(&dev->empress_workqueue);
393 return 0;
394 }
395
396 static int empress_fini(struct saa7134_dev *dev)
397 {
398 dprintk("%s: %s\n",dev->name,__FUNCTION__);
399
400 if (NULL == dev->empress_dev)
401 return 0;
402 flush_scheduled_work();
403 video_unregister_device(dev->empress_dev);
404 dev->empress_dev = NULL;
405 return 0;
406 }
407
408 static struct saa7134_mpeg_ops empress_ops = {
409 .type = SAA7134_MPEG_EMPRESS,
410 .init = empress_init,
411 .fini = empress_fini,
412 .signal_change = empress_signal_change,
413 };
414
415 static int __init empress_register(void)
416 {
417 return saa7134_ts_register(&empress_ops);
418 }
419
420 static void __exit empress_unregister(void)
421 {
422 saa7134_ts_unregister(&empress_ops);
423 }
424
425 module_init(empress_register);
426 module_exit(empress_unregister);
427
428 /* ----------------------------------------------------------- */
429 /*
430 * Local variables:
431 * c-basic-offset: 8
432 * End:
433 */